Port-cooler for reversing regenerative furnaces



L. L. KNOX. PORT COOLER FOR REVERSING REGENERATIVE FURNACES.

APPLICATION FILED MAR. 27, 1918.

Patented July 19, 1921.

3 SHEETS-SHEET la INVENTOH 6 1 WW N 1 GUNS WITNESSES I L. L. KNOX. PORTCOOLER FOR REVERSING REGENERATIVE FURNACES.

APPLICATION FILED MAR. 27, I918.

Patented July 19, 1921.

3 SHEETS-SHEET 2- WITNESSES L. L KNOX. PORT COOLER FOR REVERSINGREGENERATIVE FURNACES.

APPLICATION FILED MAR. 27, I918.

Patented July 19, 1921.

3 SHEETSSHEET 3.

INVENTOR NITED STATES PAT E T s cn.

LUTHER L. KNOX, or IBELLEVUE, PENNSYLVANIA, ASSIGNOR To BLAw-KNox cor/IIPANY, on PITTSBURGH, PENNSYLVANIA, A CORPORATION on NEW JERSEY,

roar-000L312. son REVERSING nneENEaATrvE FURNACES.

T 0 all whom it may concern Be it known that I, LUTHER L. KNOX, aresident of Bellevue, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Port-Coolersfor Reversing Regenerative Furnaces, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, .in which Figure 1 is avertical section of one end portion of an open hearth furnace embodyingmy invention; V F Fig. 2 is a section on the line 11-11 of 3 is a Viewpartly in front elevation and partly in vertical section of the portcooler removed;

Figs. 4 and 5 are, respectively, end views of the same; 7

Figs. 6 and 7 are sections taken, respecplan and Y tively, on the linesVI-VI and VII-4 11 of Fig. 3; c Fig. 8 is a view similar to Fig. 6, andshowing a modification; and i Figs. 9 and 10 are detail sectional viewsof the dome.

My invention has relation to port coolers for reversing regenerativefurnaces, and more particularly to the long type of coolers which extendtransversely substantially the full width ofthefurnace, as shown in myPatent No. 1,070,486 of August 19, 1913, and my Patent No. 1,085,139,0fJanuary 27, 19141, upon which the present invention is an improvement. 7i W The object of the present invention is to improve the constructionof the cooler, wherebyv it is stiffened or strengthened with respect tocrushing and buckling I stresses while rendered more. flexible understresses due to expansion and contraction.

A further object is to provide aport cooler of thistype having animproved con- Specification of Letters Patent. Paftgnted 19 Applicationfiled March 27, 191 8. Serial'No. 225,123. i

therein is, in general, of the long form de' scr bed and claimed in mysaid patents, extending substantially the-full width of the furnace. Itconsistsof a lsheet metal, boxlike structure having the sloping forwardwall 2, the; downwardly andforwardly sloping top wall 3,'the' centralportion 1 having the arched port opening :5therethrough, and thelaterally extending end portions 6.l The structure may be convenientlymade from sheet. metal, and the joints are preferably formed by weldingin any suitable manner, the use of rivets being preferably avoided wherepossible. The portbpenin'g 5 slopes in a downward and forward direction,and has an arched top wall 7, the central portion 4: of the structureabove the arch. 7 being also arched and of higher elevation than the toplines of the end portions 6, the curve of this arch portion merging intothe top wall of the portionj6,, In this manner, :the end portions of thestructure are reduced in height, thereby enabling the floor-of the: airport 8 of the furnaceto'be made lower than would otherwise benecessary,withoutsacrificing the thicknessof such flfoorfl, At. the sametime, a suiiicient body. of, the-cooling fluid is provided above thearchedwall of the-port opening 5.

The side, top, bottom and endwallsof the structure are preferably formedwith cofrrugations 9, pressed therein. These corrugations materiallystiffen the structure against crushing, collapsing and bucklingstresses, while atthe same time they render thewalls thereofsufficiently flexible to compensate for expansion and contractionstressesig. This is of importance in a welded structure, since thesecorrugations materially assist in protecting any tendency of thejweldsto open under expansion and contraction stresses.

I also preferablyprovide the front central portion of the structure witha corrugation 10, extending aroundthe port opening-5. The side walls ofsaid opening are .alsopreferably corrugated, as indicated at 11,? andthe floor of such opening is also shown as having corrugations 12.Thestructure may further be stiifenedbythe interior corner bracings 13,which canloe welded in place during the formation of the structure andbefore the ends thereof, are .closeda r Tfdesired, he structure maybe,prov1ded with an internal system "of bracing, such as bottom walls ofthe structure are provided with lugs or projections 14, to which arecon-- nected preferably somewhat loosely jointed bracing members 15,thus providing an effective interior. bracing having the necessaryelement of flexibility.

It will .be readily seen thatthe interior of the structure" forms areceptacle capable of containing a considerable volume of water which iscontinuous throughout and which entirely. surrounds the port opening;5'. Vhen the structure is in pla'ceiin the furnace, this port opening 5registers with the gasport lfirof the furnace in the manner clearlyshown in Fig. l. The upper portion ofthe structure is embedded in thefloor 17, between the as and air ports, while the lowerlportion 0% thestructure seatswithi'n the lower central portion of the structurehasnthe forwardly projecting flange-l8, which forms "a seat'for afilling" 19 of refractory material. The entire port open ing 5 is linedwith refractory material, as

indicated at 20, and the corrugations formed in "the walls of} thisopening assist in retainingflsuch lining in position. The for ward uppercentral portion ofthe structure is preferably'provided with thedepending hollow arched lip 21;

.VVater may be introduced into the interior.

of the structure in any suitablemann'er,

V Forthis purpose, Ihav'e' shownthe structure ashaving a pipe22,-extendi ng longitudina-lly I throughout its lower 1 portion. Thispipe is preferably provided" with a coupling 23, at each'end, and in usea supply pipe may be coupled toeither end as may be most convenient, theother end being plugged; The pipe 22 is provided with two dischargebranches 2 which deliver I the wa ter at the lower central portionfofthe structure at each side of the arch.

The iarch'ed central top portion Qf'the structure is formed witha' dome25,-shown in detailin Figs; 9 and 10, this dome being provided with a Tconnection 26, with an i 7 outlet pipe 27 for the hot *water and steam,

this pipe extending the full width of the structure and being archedupwardly at the central portion "tofconform to: the arched form of suchportion. Preferably thisf-pipe will-be arranged tofd'ischarge' at bothends, although it may be plugged up atone' end,

if desired. The vertical arm of the T26ext'ends upwardlywithin thedomeinthe manner best shown in Fig. 9, and is screwed .into aring 28,which iscarried by a series of lugs 29, welded'tdthe inside ofthe capportion 30 ofthe dome- .This cap portion "is formed separately and afterbeing screwed on'the T until stopped ,by the lug extensions 29 weldedgtothe "body port onof the idome,

' patents above referred to. the fioor'of the gas port'16. Preferablytion of the cooler structure and at the high- .iest part tl1ereo'f, s'othat the hot water, to-

gether with all steam, will readily flow into the dome and thence outofthe pipe 27. This effectually prevents the formation of pockets ofsteam structure.

within the interior of the V i The entire structurefcan be readily putin place and removed and renewed when necessary, as in the {case of I donot wish tollimit myselfto the par my previous ticular construction and'arrangement of parts which- I have'herein shown and described,sinceobviously these may be widely varied within the scope' of'theapp'ended claims. For instance, the particular shape ofthe coolermay be changed and anysuit- 'able's'ystem of interiorbracing'may beemployed, 'thecorrugations may be differently arranged, and variousother changes maybe made.

I claim:

- A port cooler forthe gas ports oii rever singregenerative furnaceshaving araised central portlon, a ,hollow dome 1n saidcentral portlonclosedat its top and communicating with the interior thereof, anaemia:

let pipe lying longitudinally within. the structure and having an armextending upwardly withinithefdome, there being a free steam and'waterpassage' within the dome to. th'e' open' end of said arm',said.pipe, armand dome forming means whereby the hot water and steam rising. into thedome are carriedto t-heends ofthe structure, substanti'al-ly asdescribed;

versing, regenerative furnaces, having a raised central portion providedwith r a hollow dome closed at its "top and communicating withthe waterspace of the interior 2L=A port cooler for the gas ports of reor thestructure, an outlet ipe "lying longitudinally within the structureandhaving an arm extending upwardly within said dome," said pipe, armand means whereby'the hot water" and steam rising into thedome arecarried to the ends of :thestructure, and a support' for said'arm withinthe dome, substantially as described.

' 3'. A port cooler for the gas ports of reversing regenerativefurnaces, comprising dome forming a hollow sheet metal box-likestructure having an arched port opening extending therethrough, a waterinlet pipe extending longi- ,t'u'dinally' ofthe structure below the,said opening andhaving discharge branches. at

opposite sides of said opening, the central portion of the structureabove said opening having a closed top dome, and an outlet connectionfor hot Water and steam extending Within said dome, said end portionsconstituting the major portion of the total length oi the structure andbeing of a depth to expletely inclosed at its sides, substantially as 10described.

In testimony whereof, I have hereunto set my hand.

LUTHER L. KNOX.

